Adjustable lubrication device for the molds of monotype casting machines



Oct 4,1932 F. SANDRINLL-l 1,881,298

ADJUSTABLE LUBRICATION DEVICE FOR THE MOLDS OF MONOTYPE CASTING MACHINES Filed Sept. 23. 1950 Patented Get.. 4, 1932 PA N OFFICE FRAN CESCO SANDRINELLI, OF BERN, SWITZERLAND ADJUSTABLE LUBRICATION DCEVIICE FOR THE MOLDS- OF MONOTYIE CASTING MACHINES IApplication iiled September 23, 1930, Serial No. 483,842, and in Germany October 7, 1929.

The present invention relates to an adjustable lubrication device for the molds of monotype casting machines which device includes as a particular feature a reheating device comprising an oil container which serving as a reheater is connected by heat conductors with the metal bath the oil delivery of said container to the type mold being effected dropwise by means of needle valves which are adjustable according to a graduation in such way that the heated oil after having dropped down upon the conical walls of the funnel shaped inlets of a distributing` head will flow in the shape of continuous thin threads of oil through the conduits leading` to the mold.

The result of such a uniform and continuous lubricating of the working surfaces of the mold will be a uniform print having clean contours and types which are not sticking 2G together.

The effect of the continuous, ropewise lubricating is at once visible in the resulting print in so far as the alternation of dry and greasy printing obtained with types of casting machines will no more exist.

ln order to obtain such a result one object of the invention is a reheating device of the container of the lubricant. rllhis device consists in providing a vessel made of heat conducting metal and heat conducting members connecting said vessel with the melting pot of the casting machine.

Another object of the invention consists in a very line adjusting device for the feeding of the lubricant dropwise from said vessel consisting in graduated needle valves and pointed dropping tubes and a venting valve of the container. Another important object of the invention is an arrangement for changing the oil drops into continuous roping strings consisting in providing the passage ways leading to the molds with funnel shaped orifices for catching up the oil drops dripping from the tubes said funnel shaped oriiices being placed somewhat eccentrical to said tubes. l

Other specific objects of the invention will be set forth in the following description.

It is the object of the present invention to chine.

do away with all the mentioned disadvantages.

The drawing represents one Working eXam-` ple of the object of the present invention.

Fig. 1 is a partly sectional sid'e elevation,

Fig. 2 is a horizontal section on line II-II in Fig. l seen from underneath,

Fig. 3 is a front view of a handle of a needle valve,

Fig. 4 a top view of the distributing head,

Fig. 5 a diagrammatical top view of the general arrangement of the lubricating device and the mold7 Fig. 6 is a top view of a plate carrying the oil container of the lubricating device7 and 7 is a view of a gauge for determining the true relative position of the distributing head and the oil container.

According to the drawing the cylindrical oilcontainer 1 preferably made of copper as al good heat conductor is secured by means of a plate 2 and an intermediate heat insulating plate 3 to the bridge 4 of a monotype casting machine. rThe oil container is fitted with a three sided stem 5 into said plate 2 and is thereby protected against turning. venting passage 8 controlled by a needle valve 7 is provided in the cover 6 screwed to the container and a glass-gauge 9 is carried by vthe cylindrical partof the container. Two

collars 10 are also clamped to this cylindrical part for holding in position two rods 11 which are made of good heat conducting metal as for instance of aluminum and are immerged into the molten metal of the ina- The bottom wall 12 of the container possesses three drilled narrow outlet passages 13. .lnto the lower ends of these passages are inserted obliquely cut-olf dropping tubes 14 the passages of which are controlled by three L needle valves 15. In order to fix the delivered quantity of liquid of` these valves their hand wheels 16 are provided on their circumference with notches 1.7 marked by a graduation and adapted to become engaged by resilient stationary catches 18. Besides this each hand wheel has a square hole 19 for a lrey. The dropping tubes project from' the bottom side of plate 2 as does also the three sided stem 5 which by means of a round dowel 5 is pressed into the bottom wall of the container. Underneath the plate 2 a cylindrical distributing head 22 is located. Passage holes 23 having funnel-shaped orifices and positioned so as to register with the three dropping tubes, but eccentrically to the same so as has been mentioned in the above, are arranged in said distributing head and it is of the greatest importance that the orifices of the funnel-shaped openings be so arranged that the oil drops do not fall directly into the holes but upon the conical surfaces of the funnels.

In order to assure this arrangement for ever after a repeated placing and replacing of the oil container a gauge according tothe Fig. 7 is used for mounting the plate 2. This gauge is shaped like a cylindrical trunnion 20 of a length corresponding to the distance between distributor and plate 2 and is putV with a centrally projecting pin 20 into a central hole 2l of the distributing head, then the plate is stuck over the eccentrical pin 20 of the gauge so that the triangular hole in rthe plate is tangential to the surface of pin and then the holes 2 (Fig. 6) are marked for the fastening screws of the bridge 4. Hereby the position of the plate 2 with regard to the mold is for ever determined and then the dropping tubes will always be located in such a way with regard to the funnel openings that the drops can only hit the conical surfaces of the funnels. The eccentricity of the pin 20 as compared to pin 20 is about three millimeters according to the diameter of the passage holes 23.

A pluralityof bent tubes 25 forming the supply conduits of the monotype molds 24 are inserted into the slender and conical outlet orifices of the passages 23. The joint between the mold and these tubes is likewise effected through conical contact surfaces. Also the joints between the tubes and the distributing head are conically ground surfaces so that always a safer communication is obtained than it would be with threaded connections, for these would become loose and unsafe after some frequent unscrewing such as it is needed. In order to keep the distributing head connected to the mold and the tubes 25 within their mountings a collar 27 having resilient braces 26 is attached to the distributor 22. By means of said arms the tubes are held resiliently but still easily detachable within their lodgings.

In the working of this lubricating device the reheating causes the liquid state of the oil quite independently from the outside temperature. Not only a safe and uniform flow of the oil becomes possible, but also` a much liner adjusting of the needle valves l5 and a quicker spreading is secured of the oil drops on the funnel surfaces of the conduits 23.

The single drops will quickly become elon-v gated and united with each other into a co# herent oil thread so that a continuous lubricating will be effected and a too much or a too little feeding be prevented owing to the finer adjusting of the valves 15.

By the eccentrical adjustment of the plate 2 with regard to the distributing head 22 by means of the gauge 2O (of Fig. 7) the oil will be transmitted to the form 24 so as to have the result of an indirect lubricating.

What I claim as newV is Y l. In a monotype casing machine a lubricating device for the molds and in combination a reheating arrangement comprising an oil container made of good heat conducting metal and heat conducting members immerged with one of their ends into the molten metal of the melting pot andwith the other attached to the container and clips embracing said container and clamped to said heat conducting members.

2. In a monotype casting machine a lubricating device for the molds and in co1nbi nation; a container for the lubricant, dropping tubes provided on this container having obliquely cut off ends for delivering the lubricant in dro-ps and a three sided stem rigidly fast to the bottom of said container as fixing means, a supporting plate for the container having a triangular hole and holes for receiving the stem and the tubes of the container in a determined position, a distributing head containing as many passage ways with funneLshaped orifices as there are drop ping tubes and oil conducting tubes tting the distributing head and the molds with conical ends so as to secure. the true relative position between distributing head and the dropping tubes of the container.

3. In a monotype casting machine a lubricating device for the molds and in combination a reheating arrangement comprising an oil container made of good heat conducting metal and heat conducting members attached 'thereto and adapted to transmit the heat of the melting pot to the container, an adjustable arrangement for regulating the flow of the lubricant so as to be delivered in small drops comprising dropping tubes ending with pointed ends, graduated needle valves controlling these passage ways and a venting valve at the top of the container, and an arrangement for changing the drops into continuous strings comprising a distributing head provided with as many passage ways having funnel shaped orifices as there are dropping tubes, spacious oil conducting tubes between distributing hcad and the molds, and means for securing a relative position of distributing head and container in which vthe drops are caught up by the side walls of the funnel shaped orifices and are joined into strings. V

In testimony whereof I affix my signature.

FRANCESCO SANDRINELLI.

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